Lock mechanism for firearms.



W E. POST. LOCK MECHANISM FOR FIREARMS. APPLIQATION FILED NOV. 10, 1910.

Patented Feb]? 1911.

IIIIIIIII "Will w WITNESSES: 16 16 wilsonEPost wavrofi A TTOR/VEY.

WILSON E. POST, OF NORWICH, CONNECTICUT.

LOCK MECHANISM FOR FIREARMS.

To all whom it may concern:

Be it known that I, WILSON E. PosT, a citizen of the United States, residing at Norwich, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Look Mechanisms for Firearms, of which the following is a specification.

The immediate object of this invention is to simplify, and cheapen to some extent, the lock mechanism of fire arms and, with that end in view, I have invented the lock mechanism illustrated in the accompanying drawings, in which Figure 1 is a side elevation, partly in section, of the frame of a break-clown gun having mounted therein lock mechanism embodying my present improvements. Figs. 2, 3 and 4 show perspective views of certain of the elementary parts of said mechanism which parts are described in detail hereinafter. Fig. 5 illustrates in plan and sectional elevation the trigger plate of the frame shown in Fig. 1 and in Fig. 6 I have illustrated a variation of my present invention in which my said improvements are adapted for use in a side-plate fire arm.

Briefly described, my present improvement consists principally in novel mechanism by means of which I am able to dispense with special springs for the sear and trigger and utilize the force of the main spring, thus reducing to a minimum number the breakable parts of the lock mechanism.

Referring to these drawings the numeral 10 indicates the frame proper of a breakdown gun and 11 indicates the trigger plate; said plate being secured at its front end to the frame 10 by means of a screw 12. The said trigger plate is provided with stands 13 between which the hammer 14 is pivotally mounted and also with similar stands 15 between which the sear 16 is pivotally fulcrumed, the front end of said sear engaging the hammer notches in the manner common to this type of fire arms and the rearwardly extending end of the sear rests upon the trigger 17 as seen in Fig. 1. The main spring 18 is a simple form of spiral spring and the same is mounted on a rod 19 whose front end portion is loosely fitted in a stand 20 formed at the front end of a bar 21. The rear end portion of the rod 19 is formed with an enlarged head 19 that is cupped as shown in Fig. 4 and is adapted to engage and cooperate with shoulders 14 and 14 Specification of Letters Patent.

Application filed November 10, 1910.

Patented Feb. 7, 1911.

Serial No. 591,617.

(see Fig. 1), in such manner that when the hammer is cooked the spring, which is then under compression, causes the said head to force the hammer forward to its firing position and also causes the said hammer to rebound. The rear end portion of the bar 21 is turned upwardly as at 21 thus providing an offset that engages a shoulder 16 on the sear at a point slightly below the center of the pin on which the sear is fulcrumed and it will now be understood that the spring 18 in seeking to expand will force the offset of the bar 21 against the sear offset 16 and will thus rock the forward end of the sear upward into close engagement with the ham mer and will also rock the rear end portion of said sear downwardly with suflicient force to return the trigger to its normal position.

Preferably, I form a groove or slot 11 in the trigger plate so that the bar 21 may be suitably guided and supported, although said bar would be effective if guided only by the stands 13 and 15.

I have thought it unnecessary to show any particular means for cooking the hammer as my present improvement has no immediate relation to the cocking mechanism. WVhen, however, the hammer is cocked the spring 18 forces the bar 21 forward into close engagement with the sear offset, thus rocking the sear into engagement with the hammer, as I have already explained, and also forces the trigger back to its normal position and all of this is accomplished through themedium of the single spiral spring 18.

In the Fig. 6 I have illustrated my said improvement as applied to a side plate gun in which instance the spring 18 is located at the rear of the hammer 14 in a slidable box 22 and the front end portion of said box is formed with a lateral extension or shoulder 22 which engagesthe sear offset 16 at a point above the pivot on which the said sear is fulcrumed. In this instance the rear end of the spring 18 abuts the end of the box 22 and the front end of said spring abuts a head or plunger 23 that is slidably mounted in said box. Between the plunger 23 and the hammer I have interposed a dog or pawl 24 whose front end portion, as here seen, is hinged to the hammer and Whose rear end abuts the plunger 23.

The described construction is such that the spring 18 in seeking to expand forces the plunger and the connected hammer forward.

My described improvements, it will be noted, are all mounted upon the trigger plate or upon the side plate, as the case may be, thus making it much easier to fit, assemble and adjust the said parts than if they were mounted inside of a hollow frame.

Having thus described my invention I claim as new and wish to secure by Letters Patent 1. In a fire-arm, the combination with a pivoted hammer and a pivoted sear, of a reciprocable member, one end thereof engageable with said sear to rock it into engagement with said hammer, and a single main-spring, one end thereof bearing against one end of said reciprocable member, moving the same to cause the other end thereof to engage said sear, mechanism interposed between said hammer and the opposite end of said spring, said spring, through said interposed mechanism, operatively associating with said hammer.

2. In a fire-arm, the combination with a pivoted hammer, a pivoted sear, and a trigger, of a reciprocable member, one end thereof engage-able with said sear to rock it into engagement with said hammer, and a single main-spring, one end thereof bearing against one end of said reciprocable member, moving the same to cause the other end thereof to engage with said sear, mechanism interposed between said hammer and the opposite end of said spring, said spring, through said interposed mechanism, operatively associating with said hammer, and said sear operatively engaging said trigger; whereby special and separate springs for the scar and trigger are elin iinated, and said single main-spring operates a combined hammer-, sear-, and triggerspring.

3. In a fire-arm, the combination with a pivoted hammer and a pivoted sear, of a reciprocable member, one end thereof engageable with said sear to rock it into engagement with said hammer, and a single main-spring, one end thereof bearing against one end of said reciprocable member, moving the same to cause the other end thereof to engage said sear, mechanism interposed between said hammer and the said spring, and including a head borne against by the other end of said spring, said spring, through said interposed mechanism, operatively associating with said hammer.

l. In a fire-arm, the combination with a pivoted hammer and a pivoted sear, of a reciprocable member, one end thereof engageable with said sear to rock it into engagement with said hammer, and a single main-spring, one end thereof bearing against one end of said reciprocable memoer, moving the same to cause the other end thereof to engage said sear, mechanism interposed between said hammer and said spring, and comprising a head borne against by the other end of said spring and a rod carrying said head, said spring, through said interposed mechanism, operatively associating with said hammer.

5. In a fire-arm, the combination with a pivoted hammer, a pivoted sear, and a trigger-plate, of a reciprocable member sliding on and guidable by said trigger-plate, one end of said reciprocable member being engageable with said sear to rock it into engagement with said hammer, and a single main-spring, one end thereof bearing against one end of said reciprocable member, moving the same to cause the other end thereof to engage said sear, mechanism interposed between said hammer and said spring, and comprising a head borne against by the other end of said spring and a rod carrying said head, said spring, through said interposed mechanism, operatively associating with said hammer.

IVILSON E. POST.

Vitnesses FRANK H. ALLEN, MADELINE D. RITCHIE. 

